Today I have dismantle the thin plate of the head stock. It was held with some kind of steel pins. I have drilled
holes and taped it with 3mm. I could not get out the original pins so I used a Dremell and ground them flat.

After removing the plate and cleaning it all I made sure that the leak is from the plexiglass window. It was not
sealing properly. I have made two new sealing from victorit but that was not sufficient. the internal part that enters
the rotor housing is also 34mm and does not enter.. I have placed an o-ring and after closing it all it seems to be
sealing and OK...

After half an hour I came back to check iif it i OK and I see that the window is broken. I have tighten the screws too
much, the window is old and had already a crack in it. Now it is completely destroyed.. I have to make a new one

Any way if I am making a new one I will change the design a bit and add a proper location and grove for an o-ring so it will
seal from the internal. Instead of the Plexiglas to be half in the air it should be surfaced with the aluminum part. I will
try to get some Polycarbonate instead of the Plexiglas or PVC that was used before. Polycarbonate is much better and less
brittle than Plexiglas.

Once I am finished I will post some images and drawings of what I did.

After about 5 hours (I have a small lathe) I finished the new clear oil indicator window.

The new window defers from the original by not having large holes for the 6mm screw heads, the window is made out of Polycarbonate. The main changes is an addition of a groove for a standard o-ring (AS568-25, CS 0.070" ID 1.176")
and the screws do not close directly on the plastic. I also created a 2mm aluminum ring. This spreads the closing
force of the screws on a larger surface, those reducing the risk of cracking it again.

I have attached some images 0205 and 0206 show how I held the Polycarbonate and aluminum ... I have a 75mm chuck
and needed a way to hold it. the parts were held by double side tape

image 0207 is the original broken window after I added the o-ring. It sealed but fell apart...

Images 0208 and 0209 are of the new clear window. image 0210 is the hold down aluminum ring.

For some reason the oil does not flow properly ? after starting it takes several seconds until there is oil in the rotor cavity.
I see oil in the window, it somehow does not flow steady but rather slow pulses.. The rotor rotates and hesitates even worse than
before my last changes.

Does the filter has a direction ?

It has a large rubber seal on one end and a narrow rubber ring on the other end. I think I placed it correctly with the larger rubber
seal at the inner part.

The clear window is getting oil in it, I see that, but for some reason it is either not flowing properly
or the rotor has too much friction ?

Do you mean the oil tube that connects to the rotor housing ?

It worked nice before I clean the head stock gear housing and replaced the oil. It should have about 5.2 litters
but I drained about 7 litters plus..

I also have another problem that the clutches slip... The gear box had maybe 0.5 litter oil in it and after
filling it with a proper oil it is now running less noisy but when I start the chuck I hear the clutch slipping ..

Old machines not handled properly more troubles...

From day to day it looks like a long project, probably did not estimated the amount of work involved...

I removed the head stock cover, disconnected the tube coming out of the pump and used a clear plexiglass
to see what happens.

First the amount of oil coming out looks nice. It was like a 5-6cm fountain with steady flow. So it seems
that the oil pump is OK.

When I disconnected the tube connected to filter the flow was less. I checked all tubes and I counold not see
any blockage..

The only things that I have seen is oil between the rotor and the clear window. I think that putting another
step into the rotor housing caused the rotor not to touch the window but some more friction. I cut about 0.5mm
from the rotor wings, those making them a bit trapezoid. So the friction between the rotor blades and window
on one side and aluminum housing on the other side should be reduced.

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